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Finding the Fourth Proportional to 109,611.91, 151,366.65 and 80,677.90

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Solution

The fourth proportional to 109,611.91, 151,366.65 and 80,677.90 is: 111,410.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,611.91 : 151,366.65 = 80,677.90 : x
  2. Step 2: Convert to fraction form
    109,611.91/151,366.65 = 80,677.90/x
  3. Step 3: Cross multiply
    109,611.91x = 151,366.65 × 80,677.90
  4. Step 4: Simplify right side
    109,611.91x = 12,211,943,452.04
  5. Step 5: Solve for x
    x = 12,211,943,452.04/109,611.91
  6. Step 6: Final answer
    x = 111,410.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.